The newest version of the Australian City Streets maps, V3.0, is compatible with Oziexplorer.

So when you have a UBD map open Ozi puts a button up on the taskbar allowing you to use some of the UBD search features.

PROBLEM. The UBD maps seem to be calibrated/referenced differently to all other maps i have. So if you load some waypoints and use the UBD maps to show their location, not only do they appear in the wrong position on the physical map, but they also display incorrect lat/long.